package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.AttrService;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

	@Autowired
	AttrAttrgroupRelationDao relationDao;

	@Autowired
	AttrGroupDao attrGroupDao;

	@Autowired
	CategoryDao categoryDao;

	@Autowired
	CategoryService categoryService;


	@Override
	public PageUtils queryPage(Map<String, Object> params) {
		IPage<AttrEntity> page = this.page(
				new Query<AttrEntity>().getPage(params),
				new QueryWrapper<AttrEntity>());

		return new PageUtils(page);
	}

	@Transactional
	@Override
	public void saveAttr(AttrVo attr) {
		AttrEntity attrEntity = new AttrEntity();
//        attrEntity.setAttrName(attr.getAttrName());
		BeanUtils.copyProperties(attr, attrEntity);
		//1、保存基本数据
		this.save(attrEntity);
		//2、保存关联关系
		if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
			AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
			relationEntity.setAttrGroupId(attr.getAttrGroupId());
			relationEntity.setAttrId(attrEntity.getAttrId());
			relationDao.insert(relationEntity);
		}


	}

	@Override
	public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
		QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type","base".equalsIgnoreCase(type)?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

		if(catelogId != 0){
			queryWrapper.eq("catelog_id",catelogId);
		}

		String key = (String) params.get("key");
		if(!StringUtils.isEmpty(key)){
			//attr_id  attr_name
			queryWrapper.and((wrapper)->{
				wrapper.eq("attr_id",key).or().like("attr_name",key);
			});
		}

		IPage<AttrEntity> page = this.page(
				new Query<AttrEntity>().getPage(params),
				queryWrapper
		);

		PageUtils pageUtils = new PageUtils(page);
		List<AttrEntity> records = page.getRecords();
		List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
			AttrRespVo attrRespVo = new AttrRespVo();
			BeanUtils.copyProperties(attrEntity, attrRespVo);

			//1、设置分类和分组的名字
			if("base".equalsIgnoreCase(type)){
				AttrAttrgroupRelationEntity attrId = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
				if (attrId != null && attrId.getAttrGroupId()!=null) {
					AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
					attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
				}

			}


			CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
			if (categoryEntity != null) {
				attrRespVo.setCatelogName(categoryEntity.getName());
			}
			return attrRespVo;
		}).collect(Collectors.toList());

		pageUtils.setList(respVos);
		return pageUtils;
	}

	@Override
	public AttrRespVo getAttrInfo(Long attrId) {
		AttrRespVo respVo = new AttrRespVo();
		AttrEntity attrEntity = this.getById(attrId);
		BeanUtils.copyProperties(attrEntity, respVo);//先把基本属性拷贝到VO


		if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) { //根据attr_type判断是base
			// 设置base信息
			//1、设置分组信息
			AttrAttrgroupRelationEntity attrgroupRelation =         //根据分组id查询出属性个分组的关联信息，如果查询出来确实有这个属性id，那就给他设置分组id,
					// 然后根据分组id查询分组信息名字，不为null再设置分组名字
					relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
			if (attrgroupRelation != null) {
				respVo.setAttrGroupId(attrgroupRelation.getAttrGroupId());
				AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelation.getAttrGroupId());
				if (attrGroupEntity != null) {
					respVo.setGroupName(attrGroupEntity.getAttrGroupName());
				}
			}
		}


		//2、设置分类信息
		Long catelogId = attrEntity.getCatelogId();
		Long[] catelogPath = categoryService.findCatelogPath(catelogId);//根据分类id查询出嵌套的分类路径并赋值到respVo
		respVo.setCatelogPath(catelogPath);

		CategoryEntity categoryEntity = categoryDao.selectById(catelogId); //根据分类id查询出分类信息，然后把名字赋值到respVo
		if (categoryEntity != null) {
			respVo.setCatelogName(categoryEntity.getName());
		}


		return respVo;
	}

	@Transactional
	@Override
	public void updateAttr(AttrVo attr) {
		AttrEntity attrEntity = new AttrEntity();
		BeanUtils.copyProperties(attr, attrEntity);
		this.updateById(attrEntity);

		if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
			//1、修改分组关联
			AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
			//为什么update无法添加分组信息？ 因为如果开始为空，即使填写了也无法传送到后端，所以需要手动添加，所以这里设置setAttrGroupId是无效的，因为根本就没获取到
			relationEntity.setAttrGroupId(attr.getAttrGroupId());
			relationEntity.setAttrId(attr.getAttrId());
//			这里把relationEntity传进去，不是后端问题，大概率是因为前端填写了这个参数，但是刚插入时没有这个参数，导致即使填写了数据但是没有绑定到对应的对象的属性上，所以导致update操作传入的Entity
//			没有这个属性，所以update操作失败，而不是更新操作本身的问题，即使字段为null，也可以更新数据

			Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",
					attr.getAttrId()));
			if (count > 0) {

				relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",
						attr.getAttrId()));

			} else {
				relationDao.insert(relationEntity);
			}
		}


	}

	/**
	 * 根据分组id查找关联的所有基本属性
	 *
	 * @param attrgroupId
	 * @return
	 */
	@Override
	public List<AttrEntity> getRelationAttr(Long attrgroupId) {
		List<AttrAttrgroupRelationEntity> entities =
				relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id",
						attrgroupId));

		List<Long> attrIds = entities.stream().map((attr) -> {
			return attr.getAttrId();
		}).collect(Collectors.toList());

		if (attrIds == null || attrIds.size() == 0) {
			return null;
		}
		Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
		return (List<AttrEntity>) attrEntities;
	}

	@Override
	public void deleteRelation(AttrGroupRelationVo[] vos) {
		//relationDao.delete(new QueryWrapper<>().eq("attr_id",1L).eq("attr_group_id",1L));
		//
		List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
			AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
			BeanUtils.copyProperties(item, relationEntity);
			return relationEntity;
		}).collect(Collectors.toList());
		relationDao.deleteBatchRelation(entities);
	}

	/**
	 * 获取当前分组没有关联的所有属性
	 *
	 * @param params
	 * @param attrgroupId
	 * @return
	 */
	@Override
	public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
		//1、当前分组只能关联自己所属的分类里面的所有属性
		AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
		Long catelogId = attrGroupEntity.getCatelogId();
		//2、当前分组只能关联别的分组没有引用的属性
		//2.1)、当前分类下的其他分组
		List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id",
				catelogId));
		List<Long> collect = group.stream().map(item -> {
			return item.getAttrGroupId();
		}).collect(Collectors.toList());

		//2.2)、这些分组关联的属性
		List<AttrAttrgroupRelationEntity> groupId =
				relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
		List<Long> attrIds = groupId.stream().map(item -> {
			return item.getAttrId();
		}).collect(Collectors.toList());

		//2.3)、从当前分类的所有属性中移除这些属性；
		QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type",
				ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
		if (attrIds != null && attrIds.size() > 0) {
			wrapper.notIn("attr_id", attrIds);
		}
		String key = (String) params.get("key");
		if (!StringUtils.isEmpty(key)) {
			wrapper.and((w) -> {
				w.eq("attr_id", key).or().like("attr_name", key);
			});
		}
		IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

		PageUtils pageUtils = new PageUtils(page);

		return pageUtils;
	}

	@Override
	public List<Long> selectSearchAttrIds(List<Long> attrIds) {
		List<Long> searchAttrIds= this.baseMapper.selectSearchAttrIds(attrIds);
		return searchAttrIds;
	}

}